Texas Instruments ADS6425IRGCT

Overview

ADS6425IRGCT from Texas Instruments is a quad-channel, 12-bit, 125-MSPS analog-to-digital converter with serial LVDS interface, internal PLL clock multiplication, 3.5 dB coarse gain + 6 dB programmable fine gain, and 70.3 dBFS SNR at 50 MHz input - deployed in base-station IF receivers for high-density signal acquisition.

For engineers reviewing the ADS6425IRGCT datasheet, ADS6425IRGCT pinout, ADS6425IRGCT application, or ADS6425IRGCT equivalent, this page delivers verified electrical specs, LVDS timing constraints, dual-mode (1-wire/2-wire) serialization, industrial-temperature operation (–40°C to 85°C), and pin-compatible migration path within the ADS64xx family.

Technical Context

The ADS6425IRGCT integrates four independent 12-bit ADC cores sharing a single PLL that multiplies the input sampling clock to generate bit/frame clocks up to 1.5 GHz. Each channel supports simultaneous sample-and-hold with 500 MHz analog input bandwidth and differential input voltage range of 2 Vpp.

Its digital interface offers configurable serialization: 2-wire DDR mode halves data rate versus 1-wire SDR, easing receiver capture below 1 Gbps; output format (MSB/LSB first, 2's complement/offset binary), LVDS current (250–450 mV differential swing), and internal termination are register- or pin-programmable.

Key Specifications

Pinout & Package

ADS6425IRGCT uses a 64-pin QFN package (9 mm × 9 mm) with exposed thermal pad, θ_JA = 23.17 °C/W (0 LFM), compatible with JEDEC-standard 4-layer PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel, high-speed ADC applications.

Compared with ADS6425IRGCT, ADS6445IRGCT delivers higher resolution at identical speed and footprint but increases power by 39%; AD9634BCPZ-125 shifts interface architecture to JESD204B, demanding FPGA redesign yet offering standardized high-speed serial transport.

Availability

ADS6425IRGCT is available at Aetrix Electronics and suitable for base-station IF receivers, medical ultrasound digitizers, and automated test equipment requiring stable component supply across extended product lifecycles.

Supply support for ADS6425IRGCT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-performance data converters for industrial, communications, and medical markets.

The ADS64xx family was designed specifically for multichannel, high-speed digitization in wireless infrastructure and instrumentation - emphasizing low jitter, flexible serialization, and thermal efficiency in compact packages.

FAQ

What is the maximum analog input frequency supported by the ADS6425IRGCT?

The ADS6425IRGCT specifies an analog input bandwidth of 500 MHz, enabling digitization of signals up to the second Nyquist zone. At 125 MSPS sampling, this supports input frequencies from DC to 500 MHz with usable SNR and SFDR performance - validated up to 230 MHz with 67.1 dBFS SNR and 78 dBc SFDR using 3.5 dB coarse gain.

Does the ADS6425IRGCT require external decoupling capacitors for its reference circuitry?

No, the ADS6425IRGCT does not require external decoupling capacitors for its internal reference - the device integrates fully buffered reference generation with VREFT = 2.0 V and VREFB = 1.0 V. External reference mode is supported via REFP/REFM pins, but even then, no external decoupling is mandated per datasheet Section 6.3.

How many LVDS data lanes does the ADS6425IRGCT use in 2-wire DDR mode?

In 2-wire DDR mode, the ADS6425IRGCT uses eight LVDS data lanes: two differential pairs per channel (DA0/DA1, DB0/DB1, DC0/DC1, DD0/DD1), totaling four channels × two pairs = eight lanes. This configuration halves the serial data rate compared to 1-wire SDR, limiting each lane to <1 Gbps for simplified receiver design.

Can the ADS6425IRGCT operate with a 5 MSPS input clock?

Yes, the ADS6425IRGCT supports input clock rates from 5 MSPS to 125 MSPS across all interface modes. At lower sampling rates, timing margins increase - for example, frame setup/hold times relax to 0.4–0.7 ns, and wake-up time from power-down remains ≤100 µs regardless of clock frequency.

What is the aperture jitter specification for the ADS6425IRGCT?

The ADS6425IRGCT has a typical aperture jitter of 250 fs rms, measured under recommended operating conditions (AVDD = LVDD = 3.3 V, 125 MSPS, 50% clock duty cycle). This low jitter directly contributes to its 70.3 dBFS SNR at 50 MHz input frequency and supports high-fidelity undersampling applications.